A large stomach like pregnancy may be pregnancy, obesity, tumors, need to be specifically analyzed. 1. Pregnancy: after pregnancy, the stomach will increase in size, accompanied by menopause, early pregnancy reaction and other symptoms, measurement of blood HCG concentration and other tests can assist in a clear diagnosis. 2. Obesity: Obesity will cause the accumulation of subcutaneous fat and visceral fat in the abdomen, which will lead to the enlargement of the stomach and obvious weight gain. 3. Tumor: abdominal tumors such as colon cancer, pelvic tumor, due to the increase of tumor volume, it will lead to stomach enlargement, which may be accompanied by symptoms such as blood in stool, emaciation, etc. Abdominal CT and other examinations can assist in clear diagnosis. There are many reasons for stomach enlargement, it is recommended to clarify the causes in time, except organic lesions, so as not to delay the condition.